puppeteer/experimental/puppeteer-firefox/lib/FrameManager.js
Andrey Lushnikov afb9355b15
feat(firefox): basic support for Network (#3988)
This patch introduces basic Request and Response events for
page. It also teaches navigation methods, e.g. `page.goto` to return
navigation response.
2019-02-12 17:38:48 -08:00

751 lines
21 KiB
JavaScript

const {helper, assert} = require('./helper');
const {TimeoutError} = require('./Errors');
const fs = require('fs');
const util = require('util');
const EventEmitter = require('events');
const {Events} = require('./Events');
const {ExecutionContext} = require('./ExecutionContext');
const readFileAsync = util.promisify(fs.readFile);
class FrameManager extends EventEmitter {
/**
* @param {PageSession} session
* @param {Page} page
*/
constructor(session, page, timeoutSettings) {
super();
this._session = session;
this._page = page;
this._timeoutSettings = timeoutSettings;
this._mainFrame = null;
this._frames = new Map();
this._eventListeners = [
helper.addEventListener(this._session, 'Page.eventFired', this._onEventFired.bind(this)),
helper.addEventListener(this._session, 'Page.frameAttached', this._onFrameAttached.bind(this)),
helper.addEventListener(this._session, 'Page.frameDetached', this._onFrameDetached.bind(this)),
helper.addEventListener(this._session, 'Page.navigationCommitted', this._onNavigationCommitted.bind(this)),
helper.addEventListener(this._session, 'Page.sameDocumentNavigation', this._onSameDocumentNavigation.bind(this)),
];
}
frame(frameId) {
return this._frames.get(frameId);
}
mainFrame() {
return this._mainFrame;
}
frames() {
/** @type {!Array<!Frame>} */
let frames = [];
collect(this._mainFrame);
return frames;
function collect(frame) {
frames.push(frame);
for (const subframe of frame._children)
collect(subframe);
}
}
_onNavigationCommitted(params) {
const frame = this._frames.get(params.frameId);
frame._navigated(params.url, params.name, params.navigationId);
frame._DOMContentLoadedFired = false;
frame._loadFired = false;
this.emit(Events.FrameManager.FrameNavigated, frame);
}
_onSameDocumentNavigation(params) {
const frame = this._frames.get(params.frameId);
frame._url = params.url;
this.emit(Events.FrameManager.FrameNavigated, frame);
}
_onFrameAttached(params) {
const frame = new Frame(this._session, this, this._page, params.frameId, this._timeoutSettings);
const parentFrame = this._frames.get(params.parentFrameId) || null;
if (parentFrame) {
frame._parentFrame = parentFrame;
parentFrame._children.add(frame);
} else {
assert(!this._mainFrame, 'INTERNAL ERROR: re-attaching main frame!');
this._mainFrame = frame;
}
this._frames.set(params.frameId, frame);
this.emit(Events.FrameManager.FrameAttached, frame);
}
_onFrameDetached(params) {
const frame = this._frames.get(params.frameId);
this._frames.delete(params.frameId);
frame._detach();
this.emit(Events.FrameManager.FrameDetached, frame);
}
_onEventFired({frameId, name}) {
const frame = this._frames.get(frameId);
frame._firedEvents.add(name.toLowerCase());
if (frame === this._mainFrame) {
if (name === 'load')
this.emit(Events.FrameManager.Load);
else if (name === 'DOMContentLoaded')
this.emit(Events.FrameManager.DOMContentLoaded);
}
}
dispose() {
helper.removeEventListeners(this._eventListeners);
}
}
class Frame {
/**
* @param {*} session
* @param {!Page} page
* @param {string} frameId
*/
constructor(session, frameManager, page, frameId, timeoutSettings) {
this._session = session;
this._frameManager = frameManager;
this._timeoutSettings = timeoutSettings;
this._page = page;
this._frameId = frameId;
/** @type {?Frame} */
this._parentFrame = null;
this._url = '';
this._name = '';
/** @type {!Set<!Frame>} */
this._children = new Set();
this._isDetached = false;
this._firedEvents = new Set();
/** @type {!Set<!WaitTask>} */
this._waitTasks = new Set();
this._documentPromise = null;
this._executionContext = new ExecutionContext(this._session, this, this._frameId);
}
async executionContext() {
return this._executionContext;
}
/**
* @param {string} selector
* @param {!{delay?: number, button?: string, clickCount?: number}=} options
*/
async click(selector, options = {}) {
const handle = await this.$(selector);
assert(handle, 'No node found for selector: ' + selector);
await handle.click(options);
await handle.dispose();
}
/**
* @param {string} selector
* @param {string} text
* @param {{delay: (number|undefined)}=} options
*/
async type(selector, text, options) {
const handle = await this.$(selector);
assert(handle, 'No node found for selector: ' + selector);
await handle.type(text, options);
await handle.dispose();
}
/**
* @param {string} selector
*/
async focus(selector) {
const handle = await this.$(selector);
assert(handle, 'No node found for selector: ' + selector);
await handle.focus();
await handle.dispose();
}
/**
* @param {string} selector
*/
async hover(selector) {
const handle = await this.$(selector);
assert(handle, 'No node found for selector: ' + selector);
await handle.hover();
await handle.dispose();
}
_detach() {
this._parentFrame._children.delete(this);
this._parentFrame = null;
this._isDetached = true;
for (const waitTask of this._waitTasks)
waitTask.terminate(new Error('waitForFunction failed: frame got detached.'));
}
_navigated(url, name, navigationId) {
this._url = url;
this._name = name;
this._lastCommittedNavigationId = navigationId;
this._documentPromise = null;
this._firedEvents.clear();
}
/**
* @param {string} selector
* @param {!Array<string>} values
* @return {!Promise<!Array<string>>}
*/
select(selector, ...values) {
for (const value of values)
assert(helper.isString(value), 'Values must be strings. Found value "' + value + '" of type "' + (typeof value) + '"');
return this.$eval(selector, (element, values) => {
if (element.nodeName.toLowerCase() !== 'select')
throw new Error('Element is not a <select> element.');
const options = Array.from(element.options);
element.value = undefined;
for (const option of options) {
option.selected = values.includes(option.value);
if (option.selected && !element.multiple)
break;
}
element.dispatchEvent(new Event('input', { 'bubbles': true }));
element.dispatchEvent(new Event('change', { 'bubbles': true }));
return options.filter(option => option.selected).map(option => option.value);
}, values);
}
/**
* @param {(string|number|Function)} selectorOrFunctionOrTimeout
* @param {!{polling?: string|number, timeout?: number, visible?: boolean, hidden?: boolean}=} options
* @param {!Array<*>} args
* @return {!Promise<!JSHandle>}
*/
waitFor(selectorOrFunctionOrTimeout, options, ...args) {
const xPathPattern = '//';
if (helper.isString(selectorOrFunctionOrTimeout)) {
const string = /** @type {string} */ (selectorOrFunctionOrTimeout);
if (string.startsWith(xPathPattern))
return this.waitForXPath(string, options);
return this.waitForSelector(string, options);
}
if (helper.isNumber(selectorOrFunctionOrTimeout))
return new Promise(fulfill => setTimeout(fulfill, /** @type {number} */ (selectorOrFunctionOrTimeout)));
if (typeof selectorOrFunctionOrTimeout === 'function')
return this.waitForFunction(selectorOrFunctionOrTimeout, options, ...args);
return Promise.reject(new Error('Unsupported target type: ' + (typeof selectorOrFunctionOrTimeout)));
}
/**
* @param {Function|string} pageFunction
* @param {!{polling?: string|number, timeout?: number}=} options
* @return {!Promise<!JSHandle>}
*/
waitForFunction(pageFunction, options = {}, ...args) {
const {
polling = 'raf',
timeout = this._timeoutSettings.timeout(),
} = options;
return new WaitTask(this, pageFunction, 'function', polling, timeout, ...args).promise;
}
/**
* @param {string} selector
* @param {!{timeout?: number, visible?: boolean, hidden?: boolean}=} options
* @return {!Promise<!ElementHandle>}
*/
waitForSelector(selector, options) {
return this._waitForSelectorOrXPath(selector, false, options);
}
/**
* @param {string} xpath
* @param {!{timeout?: number, visible?: boolean, hidden?: boolean}=} options
* @return {!Promise<!ElementHandle>}
*/
waitForXPath(xpath, options) {
return this._waitForSelectorOrXPath(xpath, true, options);
}
/**
* @param {string} selectorOrXPath
* @param {boolean} isXPath
* @param {!{timeout?: number, visible?: boolean, hidden?: boolean}=} options
* @return {!Promise<!ElementHandle>}
*/
_waitForSelectorOrXPath(selectorOrXPath, isXPath, options = {}) {
const {
visible: waitForVisible = false,
hidden: waitForHidden = false,
timeout = this._timeoutSettings.timeout(),
} = options;
const polling = waitForVisible || waitForHidden ? 'raf' : 'mutation';
const title = `${isXPath ? 'XPath' : 'selector'} "${selectorOrXPath}"${waitForHidden ? ' to be hidden' : ''}`;
return new WaitTask(this, predicate, title, polling, timeout, selectorOrXPath, isXPath, waitForVisible, waitForHidden).promise;
/**
* @param {string} selectorOrXPath
* @param {boolean} isXPath
* @param {boolean} waitForVisible
* @param {boolean} waitForHidden
* @return {?Node|boolean}
*/
function predicate(selectorOrXPath, isXPath, waitForVisible, waitForHidden) {
const node = isXPath
? document.evaluate(selectorOrXPath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue
: document.querySelector(selectorOrXPath);
if (!node)
return waitForHidden;
if (!waitForVisible && !waitForHidden)
return node;
const element = /** @type {Element} */ (node.nodeType === Node.TEXT_NODE ? node.parentElement : node);
const style = window.getComputedStyle(element);
const isVisible = style && style.visibility !== 'hidden' && hasVisibleBoundingBox();
const success = (waitForVisible === isVisible || waitForHidden === !isVisible);
return success ? node : null;
/**
* @return {boolean}
*/
function hasVisibleBoundingBox() {
const rect = element.getBoundingClientRect();
return !!(rect.top || rect.bottom || rect.width || rect.height);
}
}
}
/**
* @return {!Promise<String>}
*/
async content() {
return await this.evaluate(() => {
let retVal = '';
if (document.doctype)
retVal = new XMLSerializer().serializeToString(document.doctype);
if (document.documentElement)
retVal += document.documentElement.outerHTML;
return retVal;
});
}
/**
* @param {string} html
*/
async setContent(html) {
await this.evaluate(html => {
document.open();
document.write(html);
document.close();
}, html);
}
async evaluate(pageFunction, ...args) {
return this._executionContext.evaluate(pageFunction, ...args);
}
_document() {
if (!this._documentPromise)
this._documentPromise = this.evaluateHandle('document').then(handle => handle.asElement());
return this._documentPromise;
}
/**
* @param {string} selector
* @return {!Promise<?ElementHandle>}
*/
async $(selector) {
const document = await this._document();
return document.$(selector);
}
/**
* @param {string} selector
* @return {!Promise<!Array<!ElementHandle>>}
*/
async $$(selector) {
const document = await this._document();
return document.$$(selector);
}
/**
* @param {string} selector
* @param {Function|String} pageFunction
* @param {!Array<*>} args
* @return {!Promise<(!Object|undefined)>}
*/
async $eval(selector, pageFunction, ...args) {
const document = await this._document();
return document.$eval(selector, pageFunction, ...args);
}
/**
* @param {string} selector
* @param {Function|String} pageFunction
* @param {!Array<*>} args
* @return {!Promise<(!Object|undefined)>}
*/
async $$eval(selector, pageFunction, ...args) {
const document = await this._document();
return document.$$eval(selector, pageFunction, ...args);
}
/**
* @param {string} expression
* @return {!Promise<!Array<!ElementHandle>>}
*/
async $x(expression) {
const document = await this._document();
return document.$x(expression);
}
async evaluateHandle(pageFunction, ...args) {
return this._executionContext.evaluateHandle(pageFunction, ...args);
}
/**
* @param {!{content?: string, path?: string, type?: string, url?: string}} options
* @return {!Promise<!ElementHandle>}
*/
async addScriptTag(options) {
if (typeof options.url === 'string') {
const url = options.url;
try {
return (await this.evaluateHandle(addScriptUrl, url, options.type)).asElement();
} catch (error) {
throw new Error(`Loading script from ${url} failed`);
}
}
if (typeof options.path === 'string') {
let contents = await readFileAsync(options.path, 'utf8');
contents += '//# sourceURL=' + options.path.replace(/\n/g, '');
return (await this.evaluateHandle(addScriptContent, contents, options.type)).asElement();
}
if (typeof options.content === 'string') {
return (await this.evaluateHandle(addScriptContent, options.content, options.type)).asElement();
}
throw new Error('Provide an object with a `url`, `path` or `content` property');
/**
* @param {string} url
* @param {string} type
* @return {!Promise<!HTMLElement>}
*/
async function addScriptUrl(url, type) {
const script = document.createElement('script');
script.src = url;
if (type)
script.type = type;
const promise = new Promise((res, rej) => {
script.onload = res;
script.onerror = rej;
});
document.head.appendChild(script);
await promise;
return script;
}
/**
* @param {string} content
* @param {string} type
* @return {!HTMLElement}
*/
function addScriptContent(content, type = 'text/javascript') {
const script = document.createElement('script');
script.type = type;
script.text = content;
let error = null;
script.onerror = e => error = e;
document.head.appendChild(script);
if (error)
throw error;
return script;
}
}
/**
* @param {!{content?: string, path?: string, url?: string}} options
* @return {!Promise<!ElementHandle>}
*/
async addStyleTag(options) {
if (typeof options.url === 'string') {
const url = options.url;
try {
return (await this.evaluateHandle(addStyleUrl, url)).asElement();
} catch (error) {
throw new Error(`Loading style from ${url} failed`);
}
}
if (typeof options.path === 'string') {
let contents = await readFileAsync(options.path, 'utf8');
contents += '/*# sourceURL=' + options.path.replace(/\n/g, '') + '*/';
return (await this.evaluateHandle(addStyleContent, contents)).asElement();
}
if (typeof options.content === 'string') {
return (await this.evaluateHandle(addStyleContent, options.content)).asElement();
}
throw new Error('Provide an object with a `url`, `path` or `content` property');
/**
* @param {string} url
* @return {!Promise<!HTMLElement>}
*/
async function addStyleUrl(url) {
const link = document.createElement('link');
link.rel = 'stylesheet';
link.href = url;
const promise = new Promise((res, rej) => {
link.onload = res;
link.onerror = rej;
});
document.head.appendChild(link);
await promise;
return link;
}
/**
* @param {string} content
* @return {!Promise<!HTMLElement>}
*/
async function addStyleContent(content) {
const style = document.createElement('style');
style.type = 'text/css';
style.appendChild(document.createTextNode(content));
const promise = new Promise((res, rej) => {
style.onload = res;
style.onerror = rej;
});
document.head.appendChild(style);
await promise;
return style;
}
}
/**
* @return {!Promise<string>}
*/
async title() {
return this.evaluate(() => document.title);
}
name() {
return this._name;
}
isDetached() {
return this._isDetached;
}
childFrames() {
return Array.from(this._children);
}
url() {
return this._url;
}
parentFrame() {
return this._parentFrame;
}
}
/**
* @internal
*/
class WaitTask {
/**
* @param {!Frame} frame
* @param {Function|string} predicateBody
* @param {string|number} polling
* @param {number} timeout
* @param {!Array<*>} args
*/
constructor(frame, predicateBody, title, polling, timeout, ...args) {
if (helper.isString(polling))
assert(polling === 'raf' || polling === 'mutation', 'Unknown polling option: ' + polling);
else if (helper.isNumber(polling))
assert(polling > 0, 'Cannot poll with non-positive interval: ' + polling);
else
throw new Error('Unknown polling options: ' + polling);
this._frame = frame;
this._polling = polling;
this._timeout = timeout;
this._predicateBody = helper.isString(predicateBody) ? 'return ' + predicateBody : 'return (' + predicateBody + ')(...args)';
this._args = args;
this._runCount = 0;
frame._waitTasks.add(this);
this.promise = new Promise((resolve, reject) => {
this._resolve = resolve;
this._reject = reject;
});
// Since page navigation requires us to re-install the pageScript, we should track
// timeout on our end.
if (timeout) {
const timeoutError = new TimeoutError(`waiting for ${title} failed: timeout ${timeout}ms exceeded`);
this._timeoutTimer = setTimeout(() => this.terminate(timeoutError), timeout);
}
this.rerun();
}
/**
* @param {!Error} error
*/
terminate(error) {
this._terminated = true;
this._reject(error);
this._cleanup();
}
async rerun() {
const runCount = ++this._runCount;
/** @type {?JSHandle} */
let success = null;
let error = null;
try {
success = await this._frame.evaluateHandle(waitForPredicatePageFunction, this._predicateBody, this._polling, this._timeout, ...this._args);
} catch (e) {
error = e;
}
if (this._terminated || runCount !== this._runCount) {
if (success)
await success.dispose();
return;
}
// Ignore timeouts in pageScript - we track timeouts ourselves.
// If the frame's execution context has already changed, `frame.evaluate` will
// throw an error - ignore this predicate run altogether.
if (!error && await this._frame.evaluate(s => !s, success).catch(e => true)) {
await success.dispose();
return;
}
// When the page is navigated, the promise is rejected.
// Try again right away.
if (error && error.message.includes('Execution context was destroyed')) {
this.rerun();
return;
}
if (error)
this._reject(error);
else
this._resolve(success);
this._cleanup();
}
_cleanup() {
clearTimeout(this._timeoutTimer);
this._frame._waitTasks.delete(this);
this._runningTask = null;
}
}
/**
* @param {string} predicateBody
* @param {string} polling
* @param {number} timeout
* @return {!Promise<*>}
*/
async function waitForPredicatePageFunction(predicateBody, polling, timeout, ...args) {
const predicate = new Function('...args', predicateBody);
let timedOut = false;
if (timeout)
setTimeout(() => timedOut = true, timeout);
if (polling === 'raf')
return await pollRaf();
if (polling === 'mutation')
return await pollMutation();
if (typeof polling === 'number')
return await pollInterval(polling);
/**
* @return {!Promise<*>}
*/
function pollMutation() {
const success = predicate.apply(null, args);
if (success)
return Promise.resolve(success);
let fulfill;
const result = new Promise(x => fulfill = x);
const observer = new MutationObserver(mutations => {
if (timedOut) {
observer.disconnect();
fulfill();
}
const success = predicate.apply(null, args);
if (success) {
observer.disconnect();
fulfill(success);
}
});
observer.observe(document, {
childList: true,
subtree: true,
attributes: true
});
return result;
}
/**
* @return {!Promise<*>}
*/
function pollRaf() {
let fulfill;
const result = new Promise(x => fulfill = x);
onRaf();
return result;
function onRaf() {
if (timedOut) {
fulfill();
return;
}
const success = predicate.apply(null, args);
if (success)
fulfill(success);
else
requestAnimationFrame(onRaf);
}
}
/**
* @param {number} pollInterval
* @return {!Promise<*>}
*/
function pollInterval(pollInterval) {
let fulfill;
const result = new Promise(x => fulfill = x);
onTimeout();
return result;
function onTimeout() {
if (timedOut) {
fulfill();
return;
}
const success = predicate.apply(null, args);
if (success)
fulfill(success);
else
setTimeout(onTimeout, pollInterval);
}
}
}
module.exports = {FrameManager, Frame};